JEE Main 2013 Physics question
Two charges, each equal to q, are kept at x = −a and x = a on the x-axis. A particle of mass m and charge is placed at the origin. If charge is given a small displacement (y << a) along the y-axis, the net force acting on the particle is proportional to :
Answer: (3)
Solution
The negative charge is attracted to both positive charges; at (0, y) the x-components cancel and the y-components
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